XE88LC05MI000 ETC1 [List of Unclassifed Manufacturers], XE88LC05MI000 Datasheet - Page 36

• Manufacturer Part Number: XE88LC05MI000
• Description: 16 + 10 bit Data Acquisition Ultra Low-Power Microcontroller
• Manufacturer: ETC1 [List of Unclassifed Manufacturers]

Data Acquisition Microcontroller
XE88LC05
Table 9.5:
Table 9.6:
Table 9.7:
36
2’000’000
2’000’000
2’00’0000
2’000’000
2’000’000
2’000’000
2’000’000
2’000’000
2’000’000
Hz
frc
fin
Noise shaper order setting
q = ratio between the pulse repetition frequency (fs) and the cut-off frequency of the external
low pass filter (fc)
fs = PWM pulse repetition frequency
with frc the RC oscillator frequency; fdiv is the division factor of the frc as set by FIN.
RC clock division factor
Example:
Examples of resolution for different settings of the signal DAC and of the filter
q
fs
q
resolution
fs
1
1
1
1
1
1
1
1
2
=
=
=
=
ns_order(1:0)
log
log
(
------------------------------ -
frc
2
FIN(1:0)
Settings
MHz
2
(
)
2
00
01
( )
1x
m
2
f
0
1
⁄
(
fs
m
125
RC
(
fdiv
11
=
⁄
4
4
4
4
4
5
6
4
( )
=2MHz, FIN=1, m=4, fc=1kHz, NSorder=2 and therefore, the resolution is:
2
fc
kHz
−
)
4
. 0
)
=
226
125
1 /
Hz
fc
kHz
4’000
2’000
1’000
1’000
1’000
1’000
500
250
250
+
kHz
RC clock division factor: fdiv
4
)
+
Noise shaping order
=
2
. 6
( *
96
ns
. 6
0
1
2
1
2
96
2
2
2
2
2
2
2
2
2
−
. 2
65
125’000
125’000
125’000
125’000
125’000
Hz
62’500
31’250
62’500
fs
)
977
=
12
Performances
4 .
bit
q
4.97
5.97
6.97
7.97
8.97
5.97
4.97
1.97
5.97
resolution
bits
10.4
12.4
14.4
16.0
11.4
10.4
10.4
8.4
9.4
D0109-40